CN1547628A - Bicomponent fibers with high wicking rate - Google Patents

Bicomponent fibers with high wicking rate Download PDF

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Publication number
CN1547628A
CN1547628A CNA028166019A CN02816601A CN1547628A CN 1547628 A CN1547628 A CN 1547628A CN A028166019 A CNA028166019 A CN A028166019A CN 02816601 A CN02816601 A CN 02816601A CN 1547628 A CN1547628 A CN 1547628A
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fiber
cross
section
monofilament
ratio
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CN1266318C (en
Inventor
J��V������
J·V·哈措格
ά
J·M·霍维尔
M·H·瓦特金斯
C·舒尔策
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INVISTA TECHNOLOGIES Sarl
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EI Du Pont de Nemours and Co
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2976—Longitudinally varying

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention provides a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) and having: a weight ratio of poly(ethylene terephthalate) to poly(trimethylene terephthalate) of at least about 30:70 and no more than about 70:30, a scalloped oval cross-section selected from the group consisting of side-by-side and eccentric sheath-core; a cross-section long axis; a boundary between the poly(ethylene terephthalate) and the poly(trimethylene terephthalate) that is substantially parallel to the cross-section long axis; and a plurality of longitudinal grooves.

Description

The bicomponent fiber that wicking rate is high
The related application cross reference
Present patent application is advocated the preparation patent application No.60/315 that submit to August 30 calendar year 2001,888 senior interest.
Technical field
The present invention relates to comprise the bicomponent fiber of polyethylene terephthalate and polytrimethylene terephthalate, this fibrid of many longitudinal grooves is especially arranged.
Background technology
Polyester bi-component fibers is disclosed in United States Patent (USP) 3,671,379 and open Japanese patent application JP08-060442 in, and non-circular polyester fibers is disclosed in United States Patent (USP) 3,914,488,4,634,625,5,626,961,5,736,243,5,834,119 and 5,817,740.Yet such fiber may lack enough crimp levels and/or wicking rate, and have the fiber that improves wicking to remain dry and comfortable, especially to have both the desirable high-tension of clothes today needed.
Summary of the invention
The invention provides a kind of bicomponent fiber, comprise the polyethylene terephthalate that contacts with polytrimethylene terephthalate, wherein, the weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is at least about 30: 70 and is not more than about 70: 30, and wherein, this bicomponent fiber has:
(a) one is selected from one group the patellate non-circular cross-section of being made up of parallel type and eccentric sheath-core type;
(b) cross section major axis;
(c) border that is parallel to this major axis in fact between this polyethylene terephthalate and this polytrimethylene terephthalate; With
(d) a plurality of longitudinal grooves.
In another embodiment, the invention provides a kind of bicomponent fiber of one group that is selected from following composition: the continuous monofilament that stretches entirely, be orientated continuous monofilament, partially oriented continuous monofilament and the staple that stretches entirely entirely, wherein, this fiber comprises polyethylene terephthalate and polytrimethylene terephthalate, and has:
The weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is at least about 30: 70,
The weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is not more than about 70: 30,
The patellate non-circular cross-section is selected from parallel type and eccentric sheath-core type composition one group,
A cross section major axis,
Between this polyethylene terephthalate and this polytrimethylene terephthalate polymer boundary that is parallel to this cross section major axis in fact and
A plurality of longitudinal grooves,
Wherein,
When this fiber is when stretching monofilament entirely, crimp shrinkage rate value is at least about 30% after its heat setting,
When this fiber was full oriented monofilament, crimp shrinkage rate value was at least about 20% after its heat setting,
When this fiber is partially oriented bicomponent monofilament, after its stretching heat setting just crimp shrinkage rate value be at least about 10% and
When this fiber is when stretching staple entirely, its tow crimping shrinkage factor value is at least about 10%.
Description of drawings
Fig. 1 and 2 is the cross section of bicomponent monofilament of the present invention.
Fig. 3 shows the idealized cross section of bicomponent fiber of the present invention.
Fig. 4 A and 4B show the cross-sectional dimension of fiber of the present invention.
Fig. 5 illustrates a kind of spinnerets that can be used for making fiber of the present invention.
Fig. 6 is the cross section microphoto of a kind of bi-component staple of the present invention.
Fig. 7 shows a kind of spinning head assembly that can be used for making fiber of the present invention.
The specific embodiment
" bicomponent fiber " used herein means that a kind of wherein two kinds of polyester are in the fiber of coordination or eccentric sheath-core relation, and comprises crimped fibre and two kinds of the fibers that unredeemed latent crimp is arranged.
" cross section length-width ratio " means the length of the length of cross section major axis divided by the maximum cross section minor axis.
" groove than " means that average distance between the grand surface, mound of the outermost of groove fiber cross section is divided by the average distance between the groove of this fiber cross section.
" fiber " comprises continuous monofilament and staple in its implication.This term of " side by side " cross section means that two kinds of components of this bicomponent fiber are any and all is not more than any one small part in the sunk part of another kind of component in two kinds of components.
Fiber of the present invention comprises poly-(ethylene glycol terephthalate) (" 2G-T ") and poly-(propylene glycol ester terephthalate) (" 3G-T "), and many longitudinal grooves are arranged in its surface.Can think that such fiber has " patellate ellipse " cross section of all types as shown in Figure 3.Be preferably, the average protruding angle of each internal projection, promptly with this cross section surface tangent and the curvature flex point on each limit that is in each internal projection (in the fiber that flat gutter groove is arranged, " the darkest " portion of this groove) the average angle θ between two lines is at least about 30 ° and the two lines intersect measures the same side of the projection at its angle in that of this fiber.Have the fiber of the present invention of 4 such grooves can be called " four-way ", have 6 such groove persons to be called " six passages ", have 8 such groove persons to be called " eight passages ", the rest may be inferred.The weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is about 30: 70～70: 30, better 40: 60～60: 40 in this bicomponent fiber.
When this fiber is spun into partially oriented continuous monofilament then such as so that 1.1 X～less than 2X, when especially the draw ratio of 1.6X stretches, crimp shrinkage rate value is at least about 10% after its stretching heat setting just for test purpose such as the spinning speed with 1500～8000m/min.Especially when using the concurrent quench gas, this draw ratio can surpass 4X, and crimp shrinkage rate value is at least about 30% after the heat setting, even also be like this for the fiber with the making of high spinning speed.For example do not prepare in the presence of not in fact when helping orientation (spun orientation) continuous monofilament with the spinning speed that surpasses about 4000m/min and in the concurrent quench gas when this fiber randomly has independent stretching step, crimp shrinkage rate value is at least about 20% after its heat setting.When this fiber such as help the stretching continuous monofilament with about 500～spinning speed preparation of being lower than 1500m/min, such as stretching with the draw ratio of 2X～4.5X and about 50～185 ℃ (better about 100～200 ℃) and during about 140～185 ℃ (better about 160～175 ℃) heat treatment, crimp shrinkage rate value is at least about 30% after its heat setting.When this fiber was a kind of full stretching staple, its tow crimping shrinkage factor value was at least about 10%.
Be preferably, the cross section length-width ratio of this fiber is at least about 1.45: 1 but is not more than about 3.00: 1, and the groove ratio is at least about 0.75: 1 (better at least about 1.15: 1) but is not more than about 1.90: 1.When the groove ratio is during at least about 1.15: 1, the cross section length-width ratio can be at least about 1.10: 1.When the groove ratio was too low, this fiber may provide not enough wicking, and when it was too high, this fiber may be torn too easily.Also be preferably, this fiber has at least 4 longitudinal grooves, better the four-way cross section is arranged.
(between this polyethylene terephthalate and this polytrimethylene terephthalate) polymer boundary is the cross section major axis that is parallel to this fiber in fact.This polymer boundary is the contact wire between these two kinds of polymer." being parallel in fact " used herein comprises with this cross section major axis " consistent " in its implication and be not precluded within the place that is close to this fiber surface may significant especially departing from the depth of parallelism.Even when such departing from when being significant, these polyethylene terephthalate great majority also can be at this major axis opposite side opposite with this polytrimethylene terephthalate, vice versa.When this polymer boundary be crooked or a bit irregular-for example having in this fiber of eccentric skin-core cross section in a kind of polyester bi-component fibers will be this situation-time sometimes, this polymer boundary can be by relatively estimating dominant direction and this major axis of the longest element on this border to the substantive depth of parallelism of this cross section major axis.An a kind of like this example of dominant direction is the line " A " among Fig. 1.
Be more preferably the have an appointment inherent viscosity (" IV ") of 0.45～0.80dl/g of this polyethylene terephthalate, the IV of 0.85～1.50dl/g and this polytrimethylene terephthalate is had an appointment.Better, this IV can be respectively about 0.45～0.60dl/g and about 0.95～1.20dl/g.
Also be more preferably, the initial wicking rate of fiber of the present invention is when to a kind of 190g/m that has an appointment 2When Unit Weight and the single face jersey circular knitting fabric that comes unstuck that respectively comprises the fiber of only about 70 dawn (78 dtex) 34 continuous monofilaments are measured, be at least about 3.5cm/min.
In the polyester of formation fiber of the present invention one or both can be copolyesters, and " polyethylene terephthalate " and " polytrimethylene terephthalate " comprises such copolyesters in its implication.For example, can use the copolymerization ethylene glycol terephthalate, wherein, the comonomer that is used for making this copolyesters is selected from a group of following composition: straight chain shape, ring-type and a chain aliphatic dicarboxylic acid (for example succinic acid, glutaric acid, adipic acid, dodecandioic acid and 1,4-cyclohexane dicarboxylic acid) that 4～12 carbon atoms are arranged; Except that terephthalic acid (TPA) and the aromatic dicarboxylic acid (for example M-phthalic acid and 2,6-naphthalene dicarboxylic acids) of 8～12 carbon atoms arranged; Have the straight chain shape, ring-type of 3～8 carbon atoms and a chain aliphatic diol (for example 1, ammediol, 1,2-propylene glycol, 1,4-butanediol, 3-methyl isophthalic acid, 5-pentanediol, 2,2-dimethyl-1, ammediol, 2-methyl isophthalic acid, ammediol and 1,4-cyclohexane diol); With aliphatic that 4～10 carbon atoms are arranged and araliphatic ether glycol (for example quinhydrones two (2-ethoxy) ether or molecular weight are lower than poly-(ethyleneether) glycol of about 460, comprise diethylidene ether glycol).This comonomer can exist it not damage the degree of benefit of the present invention, for example, is benchmark with the total polymer component, reaches the level of about 0.5～15mol%.M-phthalic acid, glutaric acid, adipic acid, 1, ammediol and 1,4-butanediol are comonomers preferably.
A small amount of other comonomer also can be arranged when these copolyesters prepare, and prerequisite is that such comonomer can not produce adverse effect to the wicking feature of this fiber.Other comonomer like this comprises 5-sulfoisophthalic acid sodium, and the sodium salt of 3-(2-sulfo group ethyl) adipic acid and dialkyl thereof is a benchmark with total polyester, and its incorporation can reach about 0.2～4mol%.In order to improve acid-dyeable, should also can mix by (be total to) polyester with polymer secondary amine additive, for example gather (paraphenylene terephthalamide-6,6 '-imino-diacetic hexylamine) and with the copolyamide of hexamethylene diamine, better be its phosphate and phosphite.
Fiber of the present invention also can comprise usual additive, antistatic agent, antioxidant, antimicrobial, fire retardant, dyestuff, light stabilizer and matting agent titanium dioxide for example for example, the benefit of the present invention as long as they do not detract.
Fig. 1 and 2 is respectively the microphoto according to the fiber of embodiment 3 and 1C preparation.Fig. 3 shows the idealized cross section of bi-component four-way fiber of the present invention, and wherein, two kinds of polyester are pointed out with different lines, and the polymer boundary between them is pointed out with cross reference number 7.
Fig. 3 A shows a kind of two passage bicomponent fibers (being sometimes referred to as " dog bone " cross section), Fig. 3 B shows a kind of four-way bicomponent fiber, and its polymer boundary is consistent with the cross section major axis of this fiber in fact, Fig. 3 C shows a kind of six passage bicomponent fibers, and its polymer boundary is parallel to the major axis of this fiber cross section in fact.
Fig. 4 A shows the cross section of a kind of fiber of the present invention, and wherein, ' a ' points out the length of the major axis of this cross section, and ' b ' points out the length of the minor axis of this cross section.Fig. 4 B shows the cross section of a kind of fiber of the present invention, and wherein, ' d1 ' and ' d2 ' points out the distance between the outermost projection of this fiber, and ' c1 ' and ' c2 ' points out the distance between the groove of this fiber.Fig. 4 B shows angle θ, and each angle forms by two lines with this cross-sectional surface tangent and just on the curvature flex point on each limit of an internal projection.The cross section length-width ratio of fiber and groove ratio is what to measure from the microphoto of this fiber cross section among these embodiment.Mean ratio calculates from least 5 fibers.With reference to Fig. 4 A, a kind of length-width ratio of four-way fiber is from calculating for a/b.With reference to Fig. 4 B, a kind of groove of four-way fiber ratio calculates as (d1/c1+d2/c2)/2.
In the spinnerets that shows in Fig. 5 A, these two kinds of polyester can be fed separately into the hole 1 and 2 of the insert 3 that places on the supporter 4.Hole 1 and 2 pairing can be disposed in the concentric circles.These polyester can separate the top that arrives capillary 6 until them by blade 5, and its shape is shown among Fig. 5 B, can spin side-by-side bicomponent fibre from a kind of like this spinnerets.
Fig. 6 is a width of cloth microphoto, shows the cross section of the staple of spinning among the embodiment 4.
A kind of spinning head assembly that can be used to make fiber of the present invention of explanation among Fig. 7 A, wherein, the polyethylene terephthalate of fusion and polytrimethylene terephthalate enter first distribution plate 1 at hole 2a and 2b respectively, and via the passage 3a of correspondence and hole 4a and the 4b in the 3b arrival metering plate 5.When leaving metering plate 5, these polyester enter the groove 6a and the 6b of second distribution plate 7 of etching, come out via hole 8a and 8b, and meet each other when they enter spinnerets counterbore 9.The minor axis of spinneret capillary is designated as 10.Fig. 7 B shows the downstream face of distribution plate 1, and Fig. 7 C shows the upstream face of etch plate 6.
The first crimping by stretching shrinkage factor pH-value determination pH of the bi-component four-way continuous monofilament for preparing among the embodiment 1C is as follows.Each sample of stretching 1.6X all uses a hank knotting reel to be configured as a kind of 5000+/-5 hank knotting at total dawn (5550dtex) with the tension force of about 0.1gpd (0.09dN/tex) under the condition of describing in embodiment 1C.This hank knotting is (21+/-1 ℃) and 65+/conditioning of-2% relative humidity at least 16 hours in 70+/-2 °F.This hank knotting in fact vertically hangs on the pillar, at a 1.5mg/den of bottom hung (1.35mg/dtex) of this hank knotting counterweight (for example, for the 5550dtex hank knotting is 7.5 grams), allow the hank knotting of this extension counterweight reach balance length 15 seconds, the length of measuring this hank knotting is accurate to 1mm and is recorded as " C b".At this test period, allow this 1.35mg/dtex counterweight stay on this hank knotting.Secondly, with one 500 gram counterweight (1 00mg/d; 90mg/dtex) hang on the bottom of this hank knotting, the length of measuring this hank knotting is accurate to 1mm, and is recorded as " L b".According to following formula calculate crimp shrinkage rate value (%) (before the heat setting, as following for this test described) " CC b":
CC b＝100×(L b-C b)/L b
The 500g counterweight is taken off, this hank knotting is suspended on the support then, this 1.35mg/dtex counterweight is still motionless, about 250 (121 ℃) heat settings 5 minutes, takes out this support and hank knotting then from baking oven, and makes it cooling at least 5 minutes in baking oven.Design this step and come the simulate commercial dry heat-setting, be i.e. the final a kind of approach that curls of bicomponent fiber development.As above, measure the length of this hank knotting, and be " C its length records a".Once more this 500g counterweight is hung on this hank knotting, as above, measure this hank knotting length, and be recorded as " L a".According to crimp shrinkage rate value (%) " CC after the following formula calculating heat setting a":
CC a＝100×(L a-C a)/L a
5 samples are carried out this test, results averaged.With same procedure from the skeining step crimp shrinkage rate value after the heat setting of bi-component continuous monofilament that begins to be stretched entirely.
The tow crimping shrinkage factor pH-value determination pH that groove fiber is arranged of preparation is as follows among the embodiment 4.All tie up a knotting ring at each end of tow sample.Sample between these rings is applied tension force until with its tension, fixing metal is clipped in close each end is fixed on this sample, and on the distance of 66cm, a pair of hair clip is being fixed on this tow sample between these clips.Between this fixing metal folder and this knotting ring two at a distance of the position of 90cm, when the middle part that makes this sample keeps tension force with this sample cut-out.Sample is taken out and vertical hanging from this fixing metal folder, measured its length in back 30 seconds, be recorded as relaxed length L with cm in tension.Calculate crimp shrinkage rate (" CTU ") from following formula:
CTU(％)＝〔100×(66-L)〕/66
All test at least 2 samples and calculating mean value for each report value.
The wicking rate of fabric is that 1.8 inches (4.6cm) vertical immersion in bottom of a kind of one inch (2.5cm) the wide strip by fabric that this is come unstuck are in deionized water among the embodiment 2.With visual method determine to suct the water of this fabric height, and be that the function of time is measured with this altitude record." initial wicking rate " means the average wicking rate of this wicking test head during two minutes.
Fabric ' pull and stretch ' test is that a kind of 10cm length and the wide two-layer fabric of about 1cm of measurement are pinched between thumb and forefinger among the embodiment 2, this fabric is applied even and reproducible tensile force, hold it simultaneously and pressing close to a ruler, writing down viewed % elongation.
Embodiment 1
A. one kind 1, ammediol (" 3G ") is to issue unboiled water cooperation usefulness by the disclosed acrolein that makes like that in the picture United States Patent (USP) 5,171,898 in a kind of existence of acid cation exchange catalysts, and generation 3-hydroxy propanal prepares.With known method catalyst and any unreacting propylene aldehyde are removed, then with Raney nickel catalyst make this 3-hydroxy propanal catalytic hydrogenation (for example, as United States Patent (USP) 3,536, in 763 disclosed like that).From the aqueous solution, reclaim product 1, ammediol, refining with known method again.
B. polytrimethylene terephthalate is from 1 described in the part A of present embodiment, and ammediol and dimethyl terephthalate (DMT) (" DMT ") use in a kind of twin containers technology with the 60ppm tetraisopropyl titanate catalyst Tyzor of polymer as benchmark TPT (registration mark of E.I.du Pontde Nemours and Company) preparation.Fusion DMT is added in the ester exchange container in 185 ℃ 3G and catalyst, raise the temperature to 210 ℃ and remove methyl alcohol simultaneously.Resulting intermediate is transferred in the polycondensation container, wherein, made pressure be reduced to 1 millibar of (10.2kg/cm 2), and raise the temperature to 255 ℃.When reaching desirable melt viscosity, pressure improved and with polymer-extruded, cool off, be cut into pellet.These pellets further carry out solid phase in a rotary drum dryer, be 1.3dl/g until inherent viscosity.
C. with the polyester spinning, provide the bi-component four-way monofilament of the present invention shown in Fig. 2.With IV is the Crystar of 0.53dl/g (registration mark of E.I.du Pont deNemours and the Company) fusion of 4449 polyethylene terephthalate is also extruded being up to 287 ℃, and extrudes with the polytrimethylene terephthalate fusion of the part B of present embodiment and being up to 267 ℃.These two kinds of polymer are with 2G-T: 3G-T=50: 50 volume ratios (52: 48 weight ratios) are the horizontal blast-cold but in the air flow to one of 34 capillary spinnerets melt-spuns before about 282 ℃ spinneret combination temp is via merging illustrated in fig. 5.These monofilament are with 2560～2835m/min pile warp feed roller, with 2555～2824m/min pile warp discharge roller, and with the jet interlacing of 35psi.The 0.5wt% that with the fibre weight is benchmark uses a kind of aqueous emulsion finish, then with 2510～2811m/min this fiber of reeling.The line density that should just spin partially oriented fiber is that about 110 dawn (122decitex), intensity are 1.8dN/tex.This fiber is heated to the 1.6X that stretches on 160 ℃ the flat board at one between two rollers, second roller turns round with 400m/min.Just draw line density is 67 dawn (74dtex), and this fiber has 4.0gpd (3.5dN/tex) intensity, and just stretching heat setting crimp shrinkage rate value (" CCa ") is 16%.The average cross-section length-width ratio of these monofilament is 1.53: 1, and average projection angle is about 125 °, and average groove ratio is 0.82: 1.
Comparative example 1
Four-way one pack system polytrimethylene terephthalate comparison monofilament is to prepare from fact described in embodiment 1 part B but its IV is the polytrimethylene terephthalate preparation of 1.02dl/g.Maximum temperature in the extruder is 250 ℃, and the transfer line temperature is 254 ℃, and the spinneret component temperature is 260 ℃.Molten polymer is 34 hole spinneretss of cross section shown in Fig. 5 B to be arranged and be close to this 1 inch (2.45cm) long solid wall pipe spinning of disposing below the spinning plate surface by one by one.Then, these monofilament enter a radially quench system, wherein, quench gas is to distribute cylinder radially to supply from a porous between this monofilament and this quench gas supply pressure ventilating system, the low value of the position of the porosity of this cylinder below being close to this spinnerets is increased to the high value in centre position, is reducing facing to the position of this shock chamber outlet then.A kind of so radially the cooling in the United States Patent (USP) 4,156,071 of classifying this paper list of references as has description, but do not have that root 2.54cm pipe.Feed roller speed is 2050 yards/min (1875m/min), and discharge roller speed is 2042 yards/min (1867m/min), and winding speed is 2042 yards/min (1867m/min ").With the fibre weight is benchmark, uses a kind of usual finish with 0.5wt%.As-spun fibre has the average linear density of 106 dawn (118dtex), on a false twist texturing machine that is equipped with polyurethane discs with 500m/min and 180 ℃ of stretcher strain 1.54X.Average as-drawn fibre line density is 75 dawn (83dtex), and the average cross-section length-width ratio is 1.79: 1, and average groove ratio is 1.35: 1.
Embodiment 2
Single face jersey fabric is a circular knitting under the same conditions, and its raw material is only from the polytrimethylene terephthalate four-way one pack system monofilament (comparative sample 1) of spinning in the comparative example 1, or only from false twist texturized 34 monofilament Dacron The 938T polyethylene terephthalate four-way fiber (registration mark of E.I.du Pont de Nemours and Company; Comparative sample 2), or only from the bi-component four-way monofilament (sample 1 of the present invention) of embodiment 1 portion C.These yarns all have 34 monofilament and are knitted into individual layer.
Comparative sample 1 and 2 usefulness 2.0g/l (is benchmark with the dye bath volume) Lubit 64 (a kind of dye bath lubricants of Beyer Co., Ltd), 0.5g/l Merpol LFH (a kind of low foam surface activity agent; The registration mark of E.I.du Pont de Nemours and Company) and the 0.5g/l tertiary sodium phosphate came unstuck 30 minutes at 190 °F (88 ℃).Then, these fabrics in a kind of fresh dye bath (comparative sample 1 at 245 (118 ℃) or comparative sample 2 at 265 °F (129 ℃)) pH5.3～5.5 (acetate) with 0.128wt% (is benchmark with the fabric weight) IntrasperseViolet 2RB (Yorkshire America) and 0.070wt%Resolin Red FB (Dystar) at 1.0g/l Lubit 64 and 1.0wt%Merpol The existence of LFH was dyeed 30 minutes down.These fabrics are used 0.5g/l Merpol at 180 °F (82 ℃) Come unstuck behind LFH and the 0.5g/l tertiary sodium phosphate (to remove excess dye and lubricant) 15～20 minutes, use 0.5g/l acetate rinsing 10 minutes at 120 °F (40 ℃), dry under relaxed state at 200 °F (93 ℃), at 325 (163 ℃) (comparative samples 1) or 350 (177 ℃) (comparative samples 2) heat setting 30 seconds.
Sample 1 is used 0.5g/l Merpol at 160 °F LFH and 0.5g/l tertiary sodium phosphate came unstuck 20 minutes, at 255 and pH5.0～5.5 (acetate) with 8wt%Resolin Black LEN (Dystar) at 1.0wt%Merpol The existence of LFH was dyeed 45 minutes down, came unstuck 20 minutes after at 160 °F, at room temperature use 1.0g/l acetate rinsing 10 minutes with 4.0g/l sodium dithionite (Polyclear NPH, Henkel Corp.) and 3.0g/l soda ash, drying, and at 340 °F with 30 seconds of constant width heat setting.
Take out the sample of these yarns from the finished product fabric, its line density actual measurement is 87 dawn (sample 1) and 82 dawn (comparative example 1 and 2).The results are shown in Table 1 for these.
The wicking rate of these fabrics and tensile property have carried out mensuration and have been listed in the table 1, and wherein " Comp. " means comparative sample.
Table 1
Comparative sample 1 Comparative sample 2 Sample 1
Basis weights (g/m^ 2) ????185 ????163 ????188
Thickness (cm) ????0.06 ????0.06 ????0.05
(in the fabric) fiber dtex ????91 ????91 ????97
The layer that uses ????1 ????1 ????1
Density (g/cm^ 3〕 ????0.31 ????0.27 ????0.36
Pull and stretch
Laterally ????70％ ????73％ ????75％
Vertically ????52％ ????32％ ????65％
Wicking rate (cm)
Minute: 0 ????0.0 ????0.0 ????0.0
2 ????6.1 ????5.3 ????8.9
4 ????6.9 ????6.1 ????9.9
6 ????7.9 ????6.9 ????12.2
8 ????8.6 ????7.9 ????12.4
10 ????9.1 ????8.6 ????12.7
12 ????9.4 ????9.7 ????12.7
14 ????9.7 ????10.2 ????12.7
16 ????10.2 ????10.9 ????12.7
18 ????10.4 ????11.4 ????12.7
20 ????10.7 ????11.9 ????12.7
22 ????10.9 ????12.4 ????12.7
24 ????11.2 ????12.7 ????12.7
Initial wicking rate (cm/min) ????3.0 ????2.7 ????4.4
Data in the table 1 show that fiber of the present invention has surprising high wicking rate and higher extension is arranged, this fabric vertically on be significant especially.
Embodiment 3
As four-way bicomponent monofilament of the present invention illustrated in fig. 1 be from embodiment 1 and Fig. 5 identical 3G-T, with identical weight ratio, with identical spinnerets but use radially quenching spinning system and the Crystar described in the comparative example 1 4415 polyethylene terephthalate (IV 0.54dl/g) spinning together.The maximum temperature of the extruder of polyethylene terephthalate is 286 ℃, and the maximum temperature of the extruder of polytrimethylene terephthalate is 266 ℃, and the spinneret assembly temperature is 278 ℃.Feed roller moves with 2835m/min, and discharge roller moves with 2824m/min, and take up roll moves with 2812m/min.Partially oriented as-spun fibre has the line density of 111 dawn (123dtex), 1.77: 1 average cross-section length-width ratio, the average groove ratio of 82 ° average protruding angle and 1.12: 1.
Embodiment 4
Four-way parallel type bi-component staple of the present invention is to be 0.67dl/g and the Crystar that contains 0.3wt% titanium dioxide from IV 3956 polyethylene terephthalate and as in embodiment 1 part B, prepare in fact and IV is the polytrimethylene terephthalate preparation of 1.04dl/g.The highest extruder temperature is 290 ℃, is 250 ℃ for 3G-T that for 2G-T 2G-T: the 3G-T volume ratio is 70: 30 (71: 29 weight ratios), and the melt temperature in the spinneret combination is 285 ℃.The spinning head assembly be shown in the image pattern 7 like that.The preceding spinnerets of merging has 144 capillaries with cross section identical shown in Fig. 5 B.Monofilament spins with 800m/min.To be merged into from the end of 60 spinneretss about 22,500 dawn (25, tow 000dtex), this tow in a kind of 85 ℃ of water-baths with 100 yards/min (91m/min) stretching 2.7X, with 15psi (1.1kg/cm 2) water vapour carries out stuffer box crimping, and 100 ℃ lax 1.4 * 8 minutes, providing final line density is that 2.6 dawn (2.9dtex) and tow crimping shrinkage factor value are 12% full drawing of fiber.This tow is cut into 1.5 inches (3.8cm) with a kind of Lummus Reel staple fibre cutting knife.The average cross-section length-width ratio is 1.85: 1, and average groove ratio is 1.58: 1.The microphoto of fiber cross section is shown among Fig. 6.

Claims (10)

1. bicomponent fiber comprises polyethylene terephthalate and polytrimethylene terephthalate and has:
The weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is at least about 30: 70;
The weight ratio of polyethylene terephthalate and polytrimethylene terephthalate is not more than about 70: 30;
A kind of patellate non-circular cross-section is selected from one group that parallel type and eccentric sheath-core type are formed;
A cross section major axis;
Border that is parallel to this cross section major axis in fact between this polyethylene terephthalate and this polytrimethylene terephthalate; With
Many longitudinal grooves.
2. the fiber of claim 1, wherein
When this fiber was a kind of full stretching monofilament, crimp shrinkage rate value was at least about 30% after its heat setting;
When this fiber was a kind of full oriented monofilament, crimp shrinkage rate value was at least about 20% after its heat setting;
When this fiber was a kind of partially oriented bicomponent monofilament, crimp shrinkage rate value was at least about 10% after its stretching heat setting just; With
When this fiber was a kind of full stretching staple, its tow crimping shrinkage factor value was at least about 10%.
3. the fiber of claim 1 has:
The cross section length-width ratio is at least about 1.45: 1;
The cross section length-width ratio is not more than about 3.00: 1;
The groove ratio is at least about 0.75: 1; With
The groove ratio is not more than about 1.90: 1.
4. the fiber of claim 1, its initial wicking rate is at least about 3.5cm/min.
5. the fiber of claim 1, wherein, this fiber has a kind of four-way cross section.
6. the fiber of claim 1 has:
The cross section length-width ratio is at least about 1.10: 1;
The cross section length-width ratio is not more than about 3.00: 1;
The groove ratio is at least about 1.15: 1; With
The groove ratio is not more than about 1.90: 1.
7. the fiber of claim 6, wherein this fiber is a kind of full stretching continuous monofilament.
8. the fiber of claim 6, wherein this fiber is a kind of full stretching staple.
9. the fiber of claim 6, wherein this fiber is a kind of partially oriented continuous monofilament.
10. the fiber of claim 6, wherein this fiber is a kind of full orientation continuous monofilament.
CNB028166019A 2001-08-30 2002-08-29 Bicomponent fibers with high wicking rate Expired - Fee Related CN1266318C (en)

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